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Grade 8 Algebra: Reading Values from Function Graphs

Name: ______________________Date: ____________Score: ____ / 8

Level 3

Find inputs and compare outputs

Directions: Read each value from the graph. Each grid step is one unit.

1.
$f(x) = 4;\quad x = \ ?$
2.
$f(x) = 4;\quad x = \ ?$
3.
$f(x) = 1;\quad x = \ ?$
4.
$f(x) = -1;\quad x = \ ?$
5.
$f(x) = 4;\quad \text{find all }x$
6.
$f(x) = 0;\quad \text{find all }x$
7.
$f(3)-f(1)$
8.
$f(-2)+f(2)$

$\text{Reading}$ $\text{Values}$ $\text{from}$ $\text{Function}$ $\text{Graphs:}$ $\text{Free}$ $\text{8th}$ $\text{Grade}$ $\text{Math}$ $\text{PDF}$

$\text{A}$ $\text{function}$ $\text{assigns}$ $\text{exactly}$ $\text{one}$ $\text{output}$ $\text{to}$ $\text{each}$ $\text{input.}$ $\text{Ordered}$ $\text{pairs,}$ $\text{tables,}$ $\text{equations}$ $\text{and}$ $\text{graphs}$ $\text{show}$ $\text{these}$ $\text{relationships,}$ $\text{while}$ $\text{the}$ $\text{vertical}$ $\text{line}$ $\text{test}$ $\text{helps}$ $\text{identify}$ $\text{functions}$ $\text{and}$ $\text{graph}$ $\text{features}$ $\text{reveal}$ $\text{how}$ $\text{quantities}$ $\text{change.}$

$\text{Reading}$ $\text{Values}$ $\text{from}$ $\text{Function}$ $\text{Graphs.}$ $\text{Level}$ $\text{3:}$ $\text{Find}$ $\text{inputs}$ $\text{and}$ $\text{compare}$ $\text{outputs.}$